Adjustable lamp arm



FIG. 1 is a perspective view of the adjustable lamp arm showing my new design;

FIG. 2 is a left side view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a rear view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a top view thereof;

FIG. 8 is a perspective view of an alternative embodiment of the adjustable lamp arm showing my new design;

FIG. 9 is a left side view thereof;

FIG. 10 is a right side view thereof;

FIG. 11 is a front view thereof;

FIG. 12 is a rear view thereof;

FIG. 13 is a bottom view thereof; and,

FIG. 14 is a top view thereof. 

The ornamental design for an adjustable lamp arm, as shown and described. 